Many of us have signed up with energy companies that offer 100% renewable electricity, so why not switch to a gas tariff that also promises to be carbon neutral? Energy firm Good Energy is hoping to tempt green households to do exactly that. This week the Chippenham-based firm started offering a domestic gas tariff that will allow customers to claim their gas usage produces no overall net carbon.

Launched to coincide with the Paris climate change agreement signing yesterday, Good Energy’s “green gas” tariff will include 6% biomethane, produced in the UK from organic matter including manure and even sewage. The move makes it the latest supplier to offer green gas – produced from the 300 or so anaerobic digesters dotted around the UK, a small number of which directly feed the biogas they produce into the national grid.

Good Energy says the overwhelming majority of its 39,000 gas customers will be automatically moved to the tariff. Other emissions produced by customers will be offset through carbon-reduction schemes that support local communities in Malawi, Vietnam and Nepal.